The distance between Delhi and Mumbai is usually expressed in the unit of

Which of the following does not express a time interval?

Paheli moves on a straight road from point A to point G. She takes 20 min to cover a certain distance AB and 30 min to cover the rest of distance BG. She then turns back and takes 30 min to cover the distance GB and 20 min to cover the rest of the distance to her starting point. She makes 5 rounds on the road of the same way. Paheli concludes that her motion is

Which of the following figure shows the correct placement of a block along a scale for measuring its length?

A ball rolling on the ground represents

One metre is _________cm.

Motion of a wheel of a bicycle is ________________

The SI unit of length is ______________________

The metric system for measurement was created by the_________________

Different modes of___________________ are used to go from one place to another.

Motion of earth about its own axis is rotatory.

An elastic tape cannot give a true measurement.

A flying bird in the sky is at rest.

A cloth merchant uses a meter rod to measure the length of the cloth.

The object which does not change its position time is said to be at rest.

Give the name of the motion possessed by the vehicles on a straight road.

Mention the two contributions in 20th century towards transportation.

State how many kilometres are there in 1 metre.

Mention some modes of transportation of ancient times.

To measure chest, what type of measuring device would you use?

The distance between Radha's home and her school is 3250 m. Express this distance into km.

Can an object be in motion and rest simultaneously for different observers? Give an example and consequence.

We need standard unit of measurements for a quantity. Explain why.

Describe in detail that how do the thickness of a thin wire can be determined.

Explain how will you decide whether an object is in motion or at rest.

While travelling in a train, it appears that the trees near the track are moving whereas co-passengers appear to be stationary. Explain the reason.

It is not accurate to measure a length with elastic tapes. Explain why.